Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.34-2.51
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
-
Cleavage
Poor on {100}
None
Mohs Hardness
5-9999
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O